A New Genus and Species of Anthicidae From Western United States

Psyche: A Journal of Entomology, Jul 2018

Floyd G. Werner

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A New Genus and Species of Anthicidae From Western United States

International Journal of The first specimen of the inter 0 another dead 0 broken up 0 a living 0 a dead specimen of Tanarthrus salinus L 0 this insect is quite 0 narthrus brevipennis Csy. 0 normal 0 they have heavy spines 0 .on the internal sac 0 has a peculiar structur 0 e associated with the gonopore 0 0 BY FLOYD G. WERNER University of Arizona , Tucson , USA - best to designate this as a new genus and place it near Tanarthrus, but with some doubt as t.o its affinities. Leptanthicus gen. nov. Slender and flattened, with short elytra that leave the main part of the abdomen exposed. Metathoracic wings present but folded under the elytra in repose. Antennae n.ormal and with the last segment not divided int.o two apparent segments by a groove. Mouth parts apparently normal, with the last segment of the maxillary palpi not expanded or otherwise modified. Pron.otum rather slender, without any .obvious modifications. Mesosternum not expanded laterally, the margins straight and ending near the outer edges of the mesocoxae. Legs not modified in the male, with two spurs .on all the tibiae. Male genitalia without separate parameres, slender and pointed as in Tanarthrus. Internal sac without spines but with a com plex and unique structure around the gonopore. Type .of genus Leptanthicus staphylin.ifo.rmis sp. nov. Leptanthicus staphyliniformis sp. nov Holotype 3: almost uniformly brown in color, with darker abdomen and paler elytra, antennae, palpi, tibiae and tarsi. Surface generally finely punctured, with short and fine but moderately dense pubescence, not conspicuous ex.cept under some magnification and with longer, erect ta.ctile setae scattered over the dorsal surface .of the body. Length, to tip of elytra 1.97 mm., to tip .of abd.omen ca. 2.68 mm. Width: head 0.46 mm., pronotum 0.41 mm., and elytra ca. 0.56 mm. Head narrowly quadrate, flattened, the disc almost flat, 0.51 mm. long to base of clypeus and 0.46 mm. wide. Surface subopaque because of moderately dense but fine micr.oreticulation; pubescence short, about 0.02 mm. long, mostly subdecumbent and slightly .curved, fine and directed toward the midline on the disc. Eyes. small, 0.17 ( 0.13 mm., pla.ced well .onto the sides and protruding only slightly from the sides of the head; with short, erect pubescence. Fronto-clypeal suture distinct though short. Bases of an tennae separated by 0.18 mm. Clypeus fairly broad, 0.23 Werner-- Anthicidae ram. wide, 0.08 mm. long, with a pair of obscure teeth on its anterior margin and a pair of slight angulations near the sides.; setae longer, ca. 0.08 mm., slightly curved and projecting f.orward. Labrum largely .concealed by the clypeus from above, evenly rounded. Mandibles projecting beyond labrum, pointed and bifid at the tip, the upper tooth the longer. Maxillary palpi fairly large, the last segmerit 0.13 ( 0.08 mm., obliquely truncate. Labial palpi very small. Antennae submonilif.orm, 1.06 mm. long, with numerous erect setae. Measurements (in 0.01 mm., base to apex) 15/8, 10/6, 9/5, 8/5, 8/5, 8/5, 8/5, 8/5, 9/6, 8/6, 14/6. The second segment is relatively large, the last bluntly pointed. Pronotum 0.51 mm. long, 0.33 wide at base, 0.20 at collar and 0.44 at the widest point about 1/5 from the apex. Sides almost straight to the widest point, then rounding to collar. Disc flattened, with pubescence similar to that of head but surface more deeply microreticulate. Scutellum fairly small, rounded. Elytra subparallel, 0.95 mm. long, 0.46 mm. wide at humeri, ca. 0.56 at widest. Apices obliquely truncate, in.dividually rounded at the suture. Surface smoother than head; pubescence moderately dense, suberect, slightly curved, fine. Three full segments of the abdomen are left exposed, plus the pygidium. These are well sclerotized and separate from each other. They have pubescence similar to that on the elytra but sparser. The first two. exposed tergites are subquadrate and delimited on the sides by the exposed edges .of the sternites; both have a pair of dense patches of decumben, medially directed pale pubescence near the middle, he patches on the anterior segment much the larger. Third exposed segment reaching sides of body, with only a very narrow edge .of the sternite visible, larger han the first tw.o, somewhat arched and rounded behind. Pygidium barely visible, the edge rounded and slightly beaded. Surface and pubescence below similar to hat on dorsum of abdomen. Prosternum a flattened, hexagonal plate, with a point extended ba.ck between the procoxae. Mesosternum not expanded, forming a straight line with the medial edge .of the mesepisternum, the lateral edge of which extends dorsally into a narrow lobe anterior o he base of the elytra, this lobe following the body contour and not provided wih long setae on its free edge. Metasternum flattened but quite normal. Fifth visible abdominal sternite runcate apically, the edge very gently excavated. Legs apparently normal, moderately slender, paler (...truncated)


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Floyd G. Werner. A New Genus and Species of Anthicidae From Western United States, Psyche: A Journal of Entomology, 64, DOI: 10.1155/1957/37514